Racking device for flat-bed knitting-machines.



E. DUBIED & B. POPP. BACKING DEVICE FOR FLAT BED KNITTING MACHINES. APPLICATION FILED NOV.6,1908.

943,921. Patented Dec. 21, 1909. 2 SHEETSSHEET 1.

E. DUBIED & B. POPP. BACKING DEVICE FOR FLAT BED KNITTING MACHINES. APPLlOATION FILED NOV. e, 1908.

943,921. Patented Dec. 21, 1909.

2 SHEETSSHEET 2.

W/ TA A-SSfS iJh-lillill) hiiifiilii PATENT tlitliittllil.

EDOUARD DUBIED AND BRUNO POPP, OF COUVET, SWITZERLAND, ASSIGNORS Ti} EDOUARD DUBIED & C111, 01! COUVET, SVIITZERLAND.

BACKING DEVICE FOR FLAT-B ED II\TITTING-1\IAGHINES.

Specification of Lettersiatent. Patented Dee. Application filed fiovemlier 1908. Serial No. 461,354.

To all whom. it may concern: developed view of the stepped shog ini'r Be it known that we, EDOUARD Donna), a calm. Fig. .8 is section on the line citizen of the Republic of Switzerland, rein Fig fl: and showing the switch lever siding at Uouvet, in the Canton of Neuchfrthrown back, and Fig. 9 a section on the tel, Republic of Switzerland, (whose post l line C-l) in F 4t, also with the switch oilice address is Couvet,) and BRUNO POPP, l lever thrown bacli. Fig. it) isa. View simia citizen of the Republic of Switzerland, rclar to Fig. 8, but with the switch lever eas est.

siding at Couvet, in the Canton of Neuchzlthrown forward while Fig. 11 is a view tel, Republic of Switzm'land, (whose postsimilar to Fig. 9 but with the switch lever otiice address is Couvet,) have invented certhrown forward. Fig. 12 is a side view of ta in new and uset'ul lu'iprovcmei'its in Rackthe machine showing the means for operating Devices forFlat-Bed Knitting Machines; 1 ing the same by a treadle, and Fig. 13 is a and we do hereby 'declare the following to plan view.

be a full, clear, and exact description of the The front needle bed 1 carries a projection invention, such as will enable others skilled 2 furnished with two guiding bolts 3 and a in the art to which it appertains to make and between which astepped shrugging earn 5 use the same, reference being had to the ac gflg his cale is rotatably mounted companying drawings, and to characters of on an axle 6 and between a washer 7 and the reference marl-zed thereon, which form a machine frame 8. The depths of the steps part of this specification. ofthe stepped shogging cam correspond to In racking appliance fori'lat knitting nmthe divisions of the needle bed. The axle chines wherein a stepped shogging cam is (3 is screwed into the machine frame 8. The employed for adjusting the needle bed, prostepped shogging cam 5- carries loosely on vision has not heretofore been made to limit its axle tree 9 a switch lever 10, furnished the turning of the stepped shogging cam with an outer pawl 13 mounted on a pivot h ki th dl b d it h d 11,.and witlran inner pawl 1st mounted on therefore, when working the stepped shoga pivot 12. 'lhesc pawls are kept on their ging cam rapidly, that the revolution of the. stepped shogging cam was either not suilicient or too extensive, consequently a subsequent adjustment to obtain accuracy was still necessary.

The object of the present invention is to obtain an exact adjustment of the needle bed by a single movement of the stepped shogging cam. This is accomplished by an arrangement. of ratchets and pawls, operated in the manner hereinafter described, by which the stepped shogging camcannot turn more than one step, whether the appliance be driven by hand or by treadlc.

In the accompanying drawings are given examples of the manner in which our invcntion is carried out.

Figure 1 illustrates the central osition of the needle beds. Fig. 2 shows tie relative positions of th needle beds when one of the needle beds has been moved threeneedles to the right, and Fig. 3 shows the relative positions of the needle beds when one of the needle beds has been moved three needles to the le tw. Fig. 4 is a front view partly in section, Fig. 5 an end'view and Fig. 6 a plan illustrating part of a knitting machine embodying oanimprovements. Fig, 7 is a i and 18. The pawl 13 engages with a ratchet 21 and the pawl lat with a ratchet 22, the teeth of these ratchcts being inclined in opposite directions; springs 19 and 20 maintain the pawls in engagement with their respective ratchets. 'lhe ratchcts are rigidly connected to the stepped shogging cum 5 and are arranged on both sides of the lever 10.

The lever 10 carries two piston chambers 23, 2st, furnished with pistons 25, 26, which latter are pressed outwardly by springs 27 and 28.- ,Each piston is provided with two fixed nuts 29 and 80 which form a stop for limiting the innermost position.

Upon the outer square extremity 31 ot the axle is attached, by means of a washer and a screw 34 and revented from turning, a plate 33 formed with an abutment against which thepiston's 25. and 26 rest when the lever 10 is in its mid-position (Fig. 5). The plate 33 carries two ins 85, 36, one of which lies in the path of t e awl 13 and the other in the path of the paw 14; the latter pawl being provided with a nose 37 to insu're of it enga ing with the pin 36.

Connected to the scale 5 is a notched segpivots by washers l5 and 1G and screws 1 tit) awl 39 is )ivotallv mounted ii on the ma- P l P chine frame 8 by a screw ll.

The certain racking of the front needle I l more than one needle division to the left or bed over one or more needles takes place in the following manner. By throwing the lever 10 over from its mid-position (Fig. to its rearward position Figs. 8 and 9) the pawl 13 rotates the toothed segment 21 to the extent of one tooth, and at the same time the stepped shogging cam 5 is turned one. degree, the toothed segment 21 being to the stepped sho' 'g'nig cam, the divisions of which correspond with the teeth of the segment 21. The e fect of moving the lever 10 rearwardly will be to press'the piston 25 against the abutment (Figs. 8 and 9) and to compress the spring 27. Consequently, upon releasing the lever 10, the pressure of the spring 27 forces it back to its mid position (Fig. 5). The path of the switch lever from its mid position to where i the piston box 23 gets to rest on tlie-abutnient 32 is so designed that the switch lever cannot turn the stepped shogging cam 5 by morethaii one degree or division. The efiect of turning the stepped shogging cam 5 over one step is, owing to the uiding bolts 3 and 4 being fixed to the needle bed 1, to push the needle bed one needle-division to the right. Each time the lever 10 is moved rearwardly the front needle bed is moved one needle to the right. In order to avoid that the pawl 14; engages with the toothed segment 22, while the switch lever returns from the rearward position to 'the'mid position, the nose of the pawl 1st passes over the pin 36 and the pawl 14 is thus raised off the teeth of the toothed segment 22.

If the lever 10 be drawn forward (Fig. 11) from its mid position (Fig.5) the pawl 1 f engages with the tooth segi'nent 22, moves it, together with the stepped shoggring cam 5, one division forward. and shifts the guiding bolts from the position A (Fig. 7) into the position C, with the effect that the front needle bed 1 is moved over one needle to the left. The pawl 13, during the forward movement of the l vcr [0 passes over the pin 35 and is thereby raised off the teeth of the segment 21, for the purpose of allowing the switch lever 10 to return freely to its mid position (Fig. 10). The switch lever 10, when being moved the abutment and compresses the spring 28. The cll'cct of this will be that, upon releasing the racking lever 10, the pressure ot the spring 28 against the abutment 32 rcturns the switch lever to the mid position. The path of the switch lever 10 from its mid to the forward position, 1 presses the piston 26 (Figs. 10, 11) against i position to where the piston box 24 comes to rest on the abutment 32 is so designed that the switch lever cannot turn the stepped shogging cam by more than one division. Each forward movement of the switch lever 10 racks the front needle bed over one-needle to the lef if it be desired to move the needle bed to the right, then the lever 10 is vibrated to the one or the other side, as the case may be, many times as the desired number of needle divisions.

and 13 illustrate respectively in face view and in plan, by way of example, treadle means for actuating the lever 10. 4-23 and it are two pedals, one of which has its axis toward the'toe and the other its axis toward the heel of the foot, .llotli pedals are connectcd to a rod 4:2, which engages a coaxially 'witli the lever 10. To move the other, the right or the left pedal is depressed.

.tccording to the arrangement shown in Figs. 14, 15 and 1G, a single pedal 47 is pivoted at its center and is connected by a rod 1-2 with the lever 4:6 mounted on the shaft l to. By pressing down the pedal on the one a or the other side of its pivot the needle bed i may be moved, to the right or to the left.

ll hat we claim is l. in a racking appliance for knitting machines, the combination of a needle bed having two guiding bolts, a shogging cam turning between the said guiding bolts, the depths of the steps of the said shogging cam corresponding to the divisions of the needle bed, a switch lever for turning the cam by one division, means for returning said switch lever automatically to its mid position when having turned the cam by one division, and pawls and ratchets for allowing said cam to movebut one step at a time.

2. in a. racking appliance for knitting machines, the combination of a needle bed having two guiding bolts, a turning axle fixed on the frame of the machine, a shogging cam loosely mounted on the said turning axle and ongaging between the two guiding bolts, the depths of the' steps of the said. cam corresponding to the divisions of the needle bed, a toothed segment arranged on the axis of the com, a spring controlled pawl for securing the cam in the desired positions, and engaging with the teeth of the said segment, a switch lever for turning the cam by one division, substantially as described.

3. In a racking appliance for knitting machines, the combination of a needle bed having two guiding bolts, a turning axle fixed on the frame of the 'inachine, a shogging cam loosely mounted on the said turnl in'g axle and engaging between the two guiding bolts, the depths of the steps of the lever 40 mounted upon a shaft 45, arranged needle bed in either the one direction or theone division, the said lever'carrying two pischines, the combination-pie needle bed having two guiding bolts, ja-turning axle 'fixetd on the frame of the and engaging between the two guiding bolts,

said pistons .t-ia lly as described.

on the frame of the, machine, a shoggin cam loosely mounted on the said turning ax e and engaging between the two guiding bolts, the shagging cam said canicorresponding to the divisions of the needle bed, a toothed segment arranged, on the axis of the cam,'a spring controlled pawl for securing the cam 1n the desired depths of the steps of the said positions, and engaging withztlie teeth of the corresponding to the divisions of'the needle said-segment, two ratchetsrigidly. connected bed, ;a switch .leverhgiv'ing two pawls, two a to the ca1n,*the teeth of the said ratchets beratchets, theteeth of which beinginclined ing inclined in opposite directions,a"switch' in opposite directions, and means'for dislever also loosely mounted" onithe -axis-of the engaging. on'ep'awl from its ratchet while cam, and two pawls pivoting on-theljsaid} the other pawl is inengagement with its" switch leverand serving to: en age with the ratchet when the switch lever is returned to ratchets, substantially as described its midposition.- 1 T In a racking appliance forlmitting ma- 4. In a racking appliance for knitting Ina-r 6.

I ing two guiding bolts, I

mounted on the shaft, a rod connecting the said leverv with a single pedal, the latter pivoting'at its center, an arrangement of ratchets' and pawls and a switch lever for turning the shogging 'cani. by one division, 1, substantially'as described.

In testimony whereof machine, a shogging cam' cam mounted on the said shaft, a lever also loosely mounted-"on the said gturnmg-axl the depths of thest eps of the said cam-con I responding to the divisions of the needle (1, a switch lever for turning the cam by;

ton chambers furnished with pistons, which latter being pressed outwardly by' springs,

and an abutment lying inthepath of the two subscribing witnesses.

between "the same, substan- EDOUARD DUBIED. e ""j r BRUNO POPP.

a. In a racking appliancefor knitting ma- \Vitnesses: o a

chines, the combination of a needle bed h av- PAUL FAvNnr,

ingtwo guiding bolts, a turning axle fixed lARL GosswEILnR.

chines, the combination of a needle bed hava shaft, :1 shogging 7 we have. signed our names to this specification in the'prejsence of 

